REFLECTOR: Reflector Digest, Vol 93, Issue 8
Brett Ferrell
reflector at velocityxl.com
Mon Dec 3 11:18:58 CST 2012
I'll post a link once I have something ready.
--
Brett Ferrell
reflector at velocityxl.com
On Mon, Dec 3, 2012, at 09:29 AM, Chad Jensen wrote:
I'd love to get on the list to get a calendar for 2013...
Thanks!
Chad
On Mon, Dec 3, 2012 at 8:25 AM, <[1]reflector-request at tvbf.org> wrote:
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Today's Topics:
1. Re: Velocity Calendar 2013 (Brett Ferrell)
2. Re: GPS outage, no big deal (Brett Ferrell)
3. Re: GPS outage, no big deal (Mark Magee)
--------------------------------------------------------------------
--
Message: 1
Date: Mon, 03 Dec 2012 08:14:37 -0500
From: Brett Ferrell <[6]reflector at velocityxl.com>
To: [7]reflector at tvbf.org
Cc: Darrell & Nora Kufalk <[8]kufalk at wi.rr.com>
Subject: Re: REFLECTOR: Velocity Calendar 2013
Message-ID:
<[9]1354540477.24498.140661161180233.57BAAC88 at webmail.messagingengin
e.com>
Content-Type: text/plain; charset="utf-8"
Darrell,
Calendar submissions were very light, so it will be difficult to put
together a quality offering. I do still plan, over the next week or
two, to try and pull together a new set of pictures for a 2013
calendar. However it will necessarily feature most of the same
airplanes as this year's calendar, which is great for folks that
like
those planes, and I will use different pictures for sure...
So... one last plea, if you have a quality picture (preferably
3,000-2,500 pixels square) of a Velocity, and have the rights to use
it
(it's not a paid photographer's work for which you do not have
duplication permission), please forward it to me. Again, I would
prefer in-flight shots, but any good picture will be considered.
Thanks!
Brett
--
Brett Ferrell
[10]reflector at velocityxl.com
On Sat, Dec 1, 2012, at 12:56 PM, Darrell & Nora Kufalk wrote:
Brett,
It?s December 1^st. Any progress on the calendar or are we _OL this
year?
Darrell
From: [11]reflector-bounces at tvbf.org
[mailto:[12]reflector-bounces at tvbf.org] On
Behalf Of Brett Ferrell
Sent: Friday, October 26, 2012 10:10 AM
To: reflector
Subject: Re: REFLECTOR: Velocity Calendar 2013
Just a friendly reminder, since I haven't gotten anywhere near
enough
new pictures submitted for next year's calendar, that if you liked
the
calendar and want to have one next year, please submit (or encourage
others to submit) your favorite pictures. If you send them to me,
I'll
compile them and make the calendar available for order.
Brett
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Message: 2
Date: Mon, 03 Dec 2012 08:19:07 -0500
From: Brett Ferrell <[20]reflector at velocityxl.com>
To: [21]reflector at tvbf.org
Subject: Re: REFLECTOR: GPS outage, no big deal
Message-ID:
<[22]1354540747.25311.140661161180649.79673F99 at webmail.messagingengi
ne.com>
Content-Type: text/plain; charset="us-ascii"
It does, and we did have a instance where GPS was unavailable (it
was
not NOTAMed, and I could not get GPS on my iPad either) where the
GRT
dropped into "dead reckoning" mode. It was much better than
nothing,
but it did wander significantly from our true position over the
course
of 1/2 an hour or so. That could be installation error, but it's a
real data point. Regardless, it was a lot better than no location
data.
Brett
--
Brett Ferrell
[23]reflector at velocityxl.com
On Mon, Dec 3, 2012, at 07:46 AM, Mark Magee wrote:
On Dec 2, 2012, at 4:27 PM, Scott Derrick
<[1][24]scott at tnstaafl.net>
wrote:
Mark,
I don't know what GR's INAV is, it's certainly not real Inertial
Navigation!
As I understand it Grand Rapids, and hopefully others have
-Electronic-
INAV: which is very accurate digital accelerometers on 3 axes that
give
better accuracy than the old mechanical accelerometers coupled to
spinning gyros. Basically the AHRS that GR sells (I don't have one,
and
won't sell you one) is a stand alone box that if told where on earth
it
is, will calculate from 3 axis digital accelerometer data where on a
3D
plane you move to; no external reference. It does cross check to
GPS.
As
well you can install two of them for redundancy and they as we'll
will
cross check each other.
GR sells this AHRS to the military and others for a wide array of
applications (hopefully not the Iranians!).
Basically you get better accuracy for around $2,500 USD as to what
used
to cost the Navy 1MM each for the Submarine fleet. I knew the
engineer
at
NASA that owned the INAV package on the Space Shuttle fleet, he had
a
team of 6? folks whose full time job was to maintain the 3 INAV
boxes
in
each Orbiter. This was mid 1980's, he said each box was 1MM USD's
(x3
for
each bird). I had buddies that served on subs that had the same
boxes,
they said they would submerge off Point Loma (San Diego) and be
submerged
for 6 weeks. After 6 weeks of sub-surface maneuvering they would
surface
and take a Celestial shot and would normally be within 100 feet or
less
from where the INAV package said they were. That was 3MM USD's
technology
and a dedicated team of technicians to maintain. We can now get
better
data for around $2,500 USD's each. So buy two for cross checking and
redundancy and if Uncle Sam wants to jam my NAV (GPS), to Hell with
him:
Damn The Torpedoes an Full Speed Ahead!
I don't have to have your GPS inputs! My precious little boxes have
all
the data I need to get where I'm going, no external data required.
Jam my NAV signal? In flight?
I told you guys I am an activist on this.
Scott, it is -better- than what we used to term -real- INAV. For
fractions of a penny on the dollar.
Mark B. Magee
N34XL
Sent from IPhone 4S
_______________________________________________
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References
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Message: 3
Date: Mon, 3 Dec 2012 08:23:40 -0600
From: Mark Magee <[33]edjonesbrady at gmail.com>
To: Velocity Aircraft Owners and Builders list
<[34]reflector at tvbf.org>
Cc: "[35]reflector at tvbf.org" <[36]reflector at tvbf.org>
Subject: Re: REFLECTOR: GPS outage, no big deal
Message-ID: <[37]004E53B1-0C1E-4106-99B0-0C57A363F259 at gmail.com>
Content-Type: text/plain; charset="us-ascii"
Brett,
Do you have one AHRS's or two?
Mark B. Magee
Sent from IPhone 4S
On Dec 3, 2012, at 7:19 AM, Brett Ferrell
<[38]reflector at velocityxl.com> wrote:
> It does, and we did have a instance where GPS was unavailable (it
was not NOTAMed, and I could not get GPS on my iPad either) where
the GRT dropped into "dead reckoning" mode. It was much better than
nothing, but it did wander significantly from our true position over
the course of 1/2 an hour or so. That could be installation error,
but it's a real data point. Regardless, it was a lot better than no
location data.
>
> Brett
> --
> Brett Ferrell
> [39]reflector at velocityxl.com
>
>
> On Mon, Dec 3, 2012, at 07:46 AM, Mark Magee wrote:
>> On Dec 2, 2012, at 4:27 PM, Scott Derrick
<[40]scott at tnstaafl.net> wrote:
>>
>> Mark,
>> I don't know what GR's INAV is, it's certainly not real
Inertial Navigation!
>>
>> As I understand it Grand Rapids, and hopefully others have
-Electronic-
>> INAV: which is very accurate digital accelerometers on 3 axes
that give
>> better accuracy than the old mechanical accelerometers coupled to
>> spinning gyros. Basically the AHRS that GR sells (I don't have
one, and
>> won't sell you one) is a stand alone box that if told where on
earth it
>> is, will calculate from 3 axis digital accelerometer data where
on a 3D
>> plane you move to; no external reference. It does cross check to
GPS. As
>> well you can install two of them for redundancy and they as we'll
will
>> cross check each other.
>> GR sells this AHRS to the military and others for a wide array of
>> applications (hopefully not the Iranians!).
>> Basically you get better accuracy for around $2,500 USD as to
what used
>> to cost the Navy 1MM each for the Submarine fleet. I knew the
engineer at
>> NASA that owned the INAV package on the Space Shuttle fleet, he
had a
>> team of 6? folks whose full time job was to maintain the 3 INAV
boxes in
>> each Orbiter. This was mid 1980's, he said each box was 1MM USD's
(x3 for
>> each bird). I had buddies that served on subs that had the same
boxes,
>> they said they would submerge off Point Loma (San Diego) and be
submerged
>> for 6 weeks. After 6 weeks of sub-surface maneuvering they would
surface
>> and take a Celestial shot and would normally be within 100 feet
or less
>> from where the INAV package said they were. That was 3MM USD's
technology
>> and a dedicated team of technicians to maintain. We can now get
better
>> data for around $2,500 USD's each. So buy two for cross checking
and
>> redundancy and if Uncle Sam wants to jam my NAV (GPS), to Hell
with him:
>>
>> Damn The Torpedoes an Full Speed Ahead!
>>
>> I don't have to have your GPS inputs! My precious little boxes
have all
>> the data I need to get where I'm going, no external data
required.
>>
>> Jam my NAV signal? In flight?
>> I told you guys I am an activist on this.
>>
>> Scott, it is -better- than what we used to term -real- INAV. For
>> fractions of a penny on the dollar.
>>
>>
>> Mark B. Magee
>> N34XL
>> Sent from IPhone 4S
>> _______________________________________________
>> To change your email address, visit
>> [41]http://www.tvbf.org/mailman/listinfo/reflector
>>
>> Visit the gallery! [42]www.tvbf.org/gallery
>> user:pw = tvbf:jamaicangoose
>> Check new archives: [43]www.tvbf.org/pipermail
>> Check old archives:
[44]http://www.tvbf.org/archives/velocity/maillist.html
> _______________________________________________
> To change your email address, visit
[45]http://www.tvbf.org/mailman/listinfo/reflector
>
> Visit the gallery! [46]www.tvbf.org/gallery
> user:pw = tvbf:jamaicangoose
> Check new archives: [47]www.tvbf.org/pipermail
> Check old archives:
[48]http://www.tvbf.org/archives/velocity/maillist.html
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End of Reflector Digest, Vol 93, Issue 8
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References
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4. mailto:reflector-request at tvbf.org
5. mailto:reflector-owner at tvbf.org
6. mailto:reflector at velocityxl.com
7. mailto:reflector at tvbf.org
8. mailto:kufalk at wi.rr.com
9. mailto:1354540477.24498.140661161180233.57BAAC88 at webmail.messagingengine.com
10. mailto:reflector at velocityxl.com
11. mailto:reflector-bounces at tvbf.org
12. mailto:reflector-bounces at tvbf.org
13. http://www.tvbf.org/mailman/listinfo/reflector
14. http://www.tvbf.org/gallery
15. http://www.tvbf.org/pipermail
16. http://www.tvbf.org/archives/velocity/maillist.html
17. http://www.tvbf.org/mailman/listinfo/reflector
18. http://www.tvbf.org/archives/velocity/maillist.html
19. http://www.tvbf.org/mailman/private/reflector/attachments/20121203/c09f6145/attachment-0001.html
20. mailto:reflector at velocityxl.com
21. mailto:reflector at tvbf.org
22. mailto:1354540747.25311.140661161180649.79673F99 at webmail.messagingengine.com
23. mailto:reflector at velocityxl.com
24. mailto:scott at tnstaafl.net
25. http://www.tvbf.org/mailman/listinfo/reflector
26. http://www.tvbf.org/gallery
27. http://www.tvbf.org/pipermail
28. http://www.tvbf.org/archives/velocity/maillist.html
29. mailto:scott at tnstaafl.net
30. http://www.tvbf.org/mailman/listinfo/reflector
31. http://www.tvbf.org/archives/velocity/maillist.html
32. http://www.tvbf.org/mailman/private/reflector/attachments/20121203/6d0e1741/attachment-0001.html
33. mailto:edjonesbrady at gmail.com
34. mailto:reflector at tvbf.org
35. mailto:reflector at tvbf.org
36. mailto:reflector at tvbf.org
37. mailto:004E53B1-0C1E-4106-99B0-0C57A363F259 at gmail.com
38. mailto:reflector at velocityxl.com
39. mailto:reflector at velocityxl.com
40. mailto:scott at tnstaafl.net
41. http://www.tvbf.org/mailman/listinfo/reflector
42. http://www.tvbf.org/gallery
43. http://www.tvbf.org/pipermail
44. http://www.tvbf.org/archives/velocity/maillist.html
45. http://www.tvbf.org/mailman/listinfo/reflector
46. http://www.tvbf.org/gallery
47. http://www.tvbf.org/pipermail
48. http://www.tvbf.org/archives/velocity/maillist.html
49. http://www.tvbf.org/mailman/private/reflector/attachments/20121203/ba68f328/attachment.html
50. http://www.tvbf.org/mailman/listinfo/reflector
51. http://www.tvbf.org/archives/velocity/maillist.html
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